# $Id: util.py 7557b5d4d82b 2012/12/02 09:07:16 pgurumur $
# Copyright (c) 2009 Prabhu Gurumurthy  <pgurumur@gmail.com>
# 
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#

__version__ =  "$Revision: 7557b5d4d82b $"
__author__ = "$Author: pgurumur $"

def GetVLAN(String):
   retval = 0
   if String and isinstance(String, str):
      start = 96
      for ix in String.lower():
         try:
            retval += int(ix)
         except ValueError:
            temp = int(ord(ix))
            if (temp <= 122) and (temp > 96):
               retval += (temp - start)
   else:
      raise ValueError, "no string define or invalid string object type"

   return retval
